Error Processing Closing periodic average cost - PAC

Problem Description

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We are experiencing an error when trying to close the period of May 2013 the Periodic Average Cost - PAC.

All organizations were closed without any error, but at the close of the period we are encountering an error that says that all periods of all organizations in all groups cost the organization that has end date of the period or less periodic accounting period end date must be closed before closing the regular accounting period.

Note: Due to fail to complete the monthly close we are failing to perform the calculation of the results of the company.